Door and brake control device



Nov. 19, 1929. F. B. THOMAS DOOR AND BRAKE CONTROL DEVICE Filed April 25, 1928 INVENTQR I FRANK B.THOMAS BY ATTORNEY Patented Nov. 19, 1229 FRANK B. THOMAS, or wILKInsBURe, imnnsvnvAnia, Assrdnon TO 'rHnjWEsTINe-j 1' HOUSE AIR BRAKE COMPANY, or WILMnnn-ane, ENNSYL ANIA, A CORPORATION 7 GF PENNSYLVANIA v noon. AND BRAKE Application filed April 23,

' vide means under the control of a passenger for preventing the opening of a car door.

Another object of my invention is to provide electrically controlled means under the control of a passenger for preventing, under certain conditions, the opening or closing of the car doors and the release of the brakes.

Other objects and advantages will appear in the following more detailed description of the invention. v I

In the accompanying drawing; Fig. 1 is a diagrammatic view, partly in section,- of a car door and brake controlling equipment embodying my invention; and Fig. 2 a diagrammatic development of the door and brake controlling switch and brake valve device.

.As shown in the drawing, the equipment may-comprise a combined brake valve and brake switch device 1 for controlling the brakes and the car doors and said device may be similar to that disclosed in the pending application of Joseph C. McCune, Serial No. 235,450, filed Novcmber'25, 1927. p v

An emergencyvalve device'2 is provided comprising acasingv having a piston chamber operated bypiston 5. v i

8 connected to. an emergency brake pipe 4t and containing a piston 5 and having a valve chamber 6,connected to a main reservoir 7 a'nd'containing a slide valve 8 adapted to be e brakes electrically a service magnet valve dev ce and a release magnet valve device are provided. The serv- For controlling th ice magnet valve device comprises a magnet Sand double beat valves 10 and 11 operable'by said magnet, and the release magnet CQNTROL. DEVICE 1928. Serial na avreeo.

valve 13' adapted to be operated by said magnet.

For controllmgtheopening and closing of:

the car doors a door engine 14' is provided comprising a casing having a piston cylinder containing pistons 15 and 16 which are connected together by a stem 17 carrying a rack bar 18. The teeth of the rack bar 18 meshf with the teeth ota gear segment 19.

The segment 19 is carried by a pivoted lever 20, to one end of which is connected a rod'21 for operating the car door. The supplyY a-nd release of fluid under pressure to and'from the pistons 15 and16is controlled by arotary valve 22 and said valve is operable by a plston 23having a stem 24 which is connected to the valve 22 by an arm 25.

A door enginemagnet valve device controls the fluid pressure for operating the piston 23 and comprises a magnet 26 and double beat valves 27 and 28 adapted to beop'erated by said magnet. The circuit ofmagnet-26 'is' controlled by the movement of a treadle 29 3 which is normally held in a position to open the magnet circuit by a spring and is adapted to close the circuit when a passenger leaving the car steps on the treadle.

A door and brake interlock magnet'valve I device is provided comprising a magnet31' and avalve 32 adapted to be o'peratedby said magnet. The valve 32 controls the venting of fluid under pressure from the emergency brake pipe 4' 'toans atmo'spheric exhaust port 33 and the circuit of said magnet is'c ontrolled by a pneumatically controlled switch device comprising a p1StOI1'34' having the. chamber 7 35 at one side connected bya pipe 36 tothe site side to the pressure'of a coil spring 38.- Secured to the piston 34 is a stem 89,?carry} circuitof magnet l, themagnet 31'being also in the circuitofmagnet '26.

The circuit wire 41, p which I is connected to current supply wired?) by operation' of; a

switch nember 44; which is carried by a rod brake cylinder 37 and subject on the oppo-h ing'a switch member40 for controlling the S said circuit wire may also be connected to" a.

45, operatively connected to the door operating lever 20.

brake switch.

The circuit wire 460i the service magnet 9 is connected to a finger 47 in the brake switch and thecircuit wire48 of the release magnet 2 is connected to a contact finger 49 1n the A current supply wire 501s 1 connected to a finger 51in the brake switch. I

I In operation, when the brake valve and ergized, the valve is held seated and the brake-switch device 1 is in release position, the contact fingers 51, 49, and 47 register with contacts 52, 53, and 54, and said contacts being electrically connected, current is supplied through the wires 46 and 48, so as to energize the magnets 9 and 12. With the magnet 9 envalvell is unseated, so that fluid under pressure is supplied from the main reservoir 7 through passage 55 to the emergency brake pipe 4. The valve chamber 6 bein open to the main reservoir and the piston c iainber 3 beingopen to the emergency brake pipe which is charged with fluid at. main reservoir pres sure, the fluid pressures on opposite sides of piston 5 arebalanced and the spring 56 shifts the piston 5 to its release position, asshown pheri'c pressure, so that spring 38 holds pis ton 34 in its lower position, in which the contact member 40 closes the circult to the magnet In release position of the brake I switch, thecircuit wire 41 is not supplied with current, so that even it the treadle 29 were de'pressed by a passenger on the car, current would not-be supplied in release position to energize the magnets 31 and 26. r a

The magnet 26 being deenergized, the valve 7 held seated, while the valve 2'? is unseated, so that pipe 63, leading to piston 23 s' connected to' atmospheric exhaust port 64;, The piston 23 b3111 sub ect to atmos- 1 rpheric pressure, the spring65 holds piston 23 injits upper position and the valve 22 in the position shown, in the: drawing, in which a cavity 66 connects passage 67 lead ng to piston 1 wlith an atmospheric exhaust port 68 Piston 16is subject to fluid under pressure supplied from a source of fluid under pres-' ,sure pipe 69 through passage 70, cavity 71 in valve 22 an-d. passage 72. I

The piston- 16 .being lsubject, to fluid pres- "sure, wh le piston 1511s subgect to atmospheric j-pressu're, tl iepistons will be held in their upper positions, in which the lever 20 operates fl rough the rod 21 to hold't-he car door (not shown) closed When the car door is closed,

the rod 45 is positioned by lever 20, so that the contact memb 44 does not close the circuit 7 brake switch to service position, doors closed.

In this position, current is not supplied to the contactfingers 49, 47, and 42,'so that the magnets 9 and 12 are d'eenergized.

With the magnet 12 -deenergized,-the valve 13 is permitted to seat, so that communication from the brake cylinder 37 to the exhaust is cut off. With the magnet 9 deenergized, the valve 11 is seated, while the valve 10 is unseated, so that fluid under pressure is supplied to the brake cylinder 37, from the main reservoir 7, through passage 55, past the open valve 10, passa 8, and passage 57, I

, The car doors cannot be opened in this position, even if a passenger steps on the treadle 29, since currentis not supplied in this position. to the contact finger 42 and the wire 41, and since, therefore, the magnet 26cannot be energized. Fluid under pressure being s'up plied to the brake cylinder is also supplied to piston. chamber '35 and when the brake cylinder pressure hasbeen increased toa pre determined degree, the piston 34 will be shift 0e 59, cavity 58 in slide valve I ed upwardly, so as to cause the circuit of magnot 31 to be opened by the movement of contact member 40.

, If the operator wishes to permit the car door to he opened, he moves the brake switch to the service, doors open position, in which the contact finger 42 registers with contact 73,vwhile contact finger 51 registerswith contact 74. The contacts 7 3 and 74 being electri cally connected, current is supplied to the 3 wire 41.

7 Current supplied to wire 41 will not cause the energization of magnet 26 unless a passenger steps on and depresses the treadle 29 so as to close the circuit'oi magnet 26'. If the treadle 29 is moved to close the circuit, then the magnet 26 will be energized, "sothat the I valve 27 will b seated, while ihQVaIV 2 11 be unseateda The unseating of-valve 28 permits the flow of fluid under pressure from'the main reser-' nected through cavity '66 with exhaust port I 68, so that the piston16 is subjected to tmospheric pressure. I v v I, I

The pistons 15 and 16 then move down wardly, operating the lever 20 and thereby the rod 21 so as to open the cardoor. Inthis V movement, the rod 45 is shifted upwardly so I tain the magnet 26 energized.

that the contact member 44 closes the Circuit from supply wire 43 to wire 41.-

If the operator shouldattempt to close the car door by moving the brake switch from the service doors open to the service doors closed position, he will be unable to do so as long as a passenger holds the treadle29 depressed, since, although the movement of the brake switch to the service doors closed position, cuts oil the supply of current from the brake switch to the wire 41, current will still be supplied from the supply wire 43 through the Contact member 44 to the wire 41 to main- When there is no passenger holding the treadle 29 depressed, the treadlefwill return to its normal position, in which the circuit to the magnet- 26 is opened and the magnet 26 being thusdeenergized, the valve 28 will be seated, while the valve 27 will be unseated.

Fluid under pressure is then vented from pistheclosure of thecar door.

If theoperator should attemptto release the brakes while a passenger is holding the treadle depressed, the movement of the brake 7 switch to release position will cause the mag- 1 nets 9 and 12 to be energized, so that, as hereinbefore described, the brake cylinder 37 will be vented to the atmosphere by way of cavity 61 in slide valve 8 and atmospheric exhaust port 62, but as soon as the pressure in the brake cylinder has fallento a predetermined degree, the .piston 34 willbe moved downwardly by spring 38 so as to close the circuit to magnet 31. v V

The circuit being closed bythe depression oftreadle 29, current supplied from the supply wire43, through the contact member 44 to thewire 41flows through the contact member 40 to energize the magnet '31.

' When'magnet 31 is energized, the valve 32 is unseated, so that fluid under pressureis vented from the emergency brake pipe 4 to the atmosphere, through port 33. The venting of fluid from the emergency brake pipe causes theiemergency piston 5 to be shifted to it's righthand position,-in which passage-57 is opened to valve chamber 6, sothat fluid under pressure is supplied from the main reservoir 7 tofthe brake cylinder to effect an emergencyapplication of the brakes. It will thus be seen that if the operator 'should attempt to release the brakes, while a passenger is holding the treadle depressed, an emergency application ofthe brakes willbeeffected;

1 The brakes cannot be released until the pas. senger leaves the treadle :29 and permits same to move upwardly so as to open the circuit to themagnet 31. The magnet 31 being then deenergized, the v'alve32 is moved to its seat and with the brake switch in release position,

the magnets 9 and 12 are energized, ,so that valve 11' is unseated to permit flow of fluid brake 1 pipe 4. The emergency piston 5 is from, the main reservoir to the emergency then shifted to release position and'the brakes i are released in the manner hereinbefore described. The deenergization of magnet 26- also effects the operationof the door engine, 1 so as to close the ear door, by venting fluid under pressure from the piston 23'and-the movement ofthe door engine to close the car door also operates the switch member 44 to openthe circuit between-the current supply wire 43 and the wire'41.

"In the emergency position of thelbrake valve and brake switch device, the emergency brake pipe isvented to the atmosphere, so as to cause the operation of the emergencyvalve device 2 to effect an emergency 7 application of the brakes and the contact finger 51' engages a contact 7 6, whilecontact finger '42 engages a contact- 77 which is electrically connected-to contact 76, so that 'current'is supplied to the wire 41 and, consequ ently when a passenger depresses the treadle 29, a circuit is closed to energizethe magnet 26,,asinthe service doors openposition, and the car dooris opened.

The source-of fluid pressure supply pipe' '69 may be the emergency brakejpipe of a-fiuid pressure brake system, in which case when I an emergency application of'the brakes is effected, by reducing the pressure in the emergency brake pipe, the piston" 16, being' connected to the emergency,,will be vented,

with the brake'pipe, so thatthe pistons 15 L vWillbe alan'cedas to fluid pressure,- I

thus permitting the car doorto' be opened or closed by a passenger on the car. 7

'While' one:illustrative embodiment of the Y invention has been describedin detail, it is not my intention to limiti'ts scope to that embodiment or otherwise thanby the terms of the appended claims. 1

Having thus described my inventionywhati. i I'claIm as new anddes'ire to secure by Letters r I Patent, is 1.- The 'combinati trolling a car door, of electrically controlled means for effecting the operation of said door controlling means to open the car dQor,-man- 'ually controlled means for controlling the op erati'o'nor said electrically controlledmeans,

and means controlled by a passenger for permitting the operation or said electrically con- M trolled means by said manuallycontrolled means. i t Y I 2. The combination with means for con-i trolling a carfdoor,'of electrically controlled on with means for. con-,

means 'for effecting the operation of said door controllingmeans to open the' 'car door, manually controlled means for controlling the operation of saidflelectrically controlled means,van d a treadle for controlling the cir- Quit ofsaid electrically controlledmeans.

j3i'The combination'with means for con,- trolling a car door, of electrically controlled meansoperative upon energization for eliecting the operation of said door controlling mean .to open the car door, a switch device 'operable'by a passenger for closing the circuit to said electrically controlled means, and

means controlled by theoperatorof the car for supplying current to energize said elece tric'ally controlled means whenthe circuit is closed by said'sWitch device. 4r. The combination with a door engine for controllingthe openingand closing of acar door, of a piston device operated by fluid under'pressure for controlling the operation of said. door enginefelectricallyr controlled means for controlling the fluid pressure on,

' trically controlled means,and a switch device operative by a-passenger on the car foreclosing the circuit. of said electrically controlled m ans! a I a t 1 "6.,The combination with a door engine for controlling the openingand closing of a ,car door, of electrically controlled means for effecting the operation 7 of said door engine,

1 manually contr'olledmeans for controlling the "operation of said electrically controlled means, a switch device operable by a passenger for clos ng'the circuitto; said electrically controlledmeans, and a switch device operated upon movement of -said door engine to open the car door fore losing a circuit for supplying current to said; electrically controlled means.

;V7,-The combinat on with adoor engine for controllmg the opening andclosing of a car door, of electrically controlled means for e'filecting the operation of said door engins, a manually operated sw tchdevice having a position for supplying current to energize said electrically controlled means, a switch device operated-upon movement of said doorsengine to, open the car door for csupplyingcnrrentto energize said electriy cal'lyc-ontrol-led means, anda switch device operable by a passenger on the car for closing the oircuit from; .said inanually operated switch devicel andfrom sald doorfengine controlled switch device tosaid electrically con trolled means.' I j 8,. In abrakeequipment,the combination h n m e e ting e rres e ing controlled by saidlswitch'devices.

weenie and release of the brakes, of brake applying means operative upon releasing the brakes for effecting anv application of the] brakes and means operable by apassenger on the car for rendering said brake applying means effective to apply the brakes. v 9. In a brake equipment,- the combination with apparatus for effecting" the application and release of the brakes, of auxiliary means for applying the brakes, means operated operation of said auxiliary means,'and means operated by a passenger on the car for rendering said auxiliary means efiective to ap ply the brakes. 7

10. In a brake equipment, the combination with "a brake cylinder, of 'celectrically controlled means for supplying fluid under pres sure to the brake, cylinder, a switch device normally closing the circuit't'o said electrically controlled means and operated by brake cylinder pressure foropening said cir- "cuit, and a switch device operable; by a passenger on the carefor also controlling the circuit to said electrically controlled means.

11. The combination with a brake cylinder, of adoo-r engine for controlling the opening and closing of a car door, electrically controlled means for effecting t-hesupply of fluid under pressure to thebrake cylinder, a switch device normally closing the circuit to said electrically controlled means and operated by brake cylinder ressure for opening the circuit, a switch device'operable by a Passenger 7 on the car for also closing the circuit, and a switch device operated upon movemen'tiof also closing the circuit to said electrically c-ontrolledmeans;

12. The combination with a brake cylinder said'door engine to the door open position for and a door engine for controlling the opening and closing of a car door, of electrically controlled means operatedupon energiz'ation for effecting the supply of fluid under pressure to thebrake cylinder and means controlled apassenger on the car and. effective toen ergi'ze said electrically controlled means when the door englne' 1s 1n the door .openposition andfiuid pressure is released from the brakecylinderj I I e 13,. The combination with a brake cylinder and afdoor engine for controlling the open ing and closing of a car door, of electrically controlledme'ansoperated upon energization.

for effecting'anapplication'o-f the brakes, e 0? switch device controlled by saidldoor engine,

a switch device controlled by a passenger on the car, and a switch devicecontrolled bybrake cylinder pressure, the'lenergizing circuit for said electrically controlled means belL. The combination witlia brake cylinder anda door engine for controlling the opening and closing oi'ra oar'door, of eleotr1callyconftr-olledmeans operated upon energizat on for i 30 upon releasmg the brakes for effectlng the efiectinv an application of the brakes, a switch evice controlled by said door engine,

a switch device controlled by a passenger on the car, and a switch device controlled by.

brake cylinder pressure, said switches controlling the energizing circuit of said elec-' trically controlled means and permitting energization of said electrically controlled 7 means only when all three switch devices are in the circuit closing position.

In testimony whereof I have hereunto set my hand.

FRANK B. THOMAS. 

